When citing multiple authors in APA, you can either use the "&" symbol or list all of the authors' names in the order they appear on the source. For example, if you were citing a source with three authors, you could either write "Smith, Jones, & Smith" or "Smith, Jones, Smith." If you are citing a source with more than three authors, you can either write "et al." after the first author's name or list all of the authors' names in the order they appear on the source.